One must presume that long and short arguments contribute to the same end. - Epicurus...except casandra's that did belong to the funniest, most interesting and imaginative (or over-imaginative?) ones, I suppose.

I use the freeware ApE (A Plasmid Editor) that has this built in as one of the functions. It's pretty cool - you can mouse over the fragments and it will tell you the size, which enzymes it was cut with, the positions and the relative mass percent.